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    <title>Document</title>
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<script>
    // 九九乘法表

    // 声明乘法表变量字符串
    let str = '';
    for (let i = 1; i <= 9; i++) {
        for (let j = 1; j <= i; j++) {
            str += `${j} × ${i} = ${j * i}\t`;
        }
        str += '\n';
    }

    // 控制台打印
    console.log(str);
</script>

</html>